Interaction of the pulsed aluminum wire plasma with the polyethylene wall

Summary form only given, as follows. A fast-pulsed exploding aluminum wire set on a low-density polyethylene (LDPE) flat wall is presented. Various phases of brightness and darkness between the narrow bright aluminum plasma and the wall surface have been observed. A dark layer has been formed which moves away from the wall surface according to the released input energy. The shape of the layer was affected by the interaction with both the insulator wall and the electrodes. The radial reflected visible light by the insulator wall consists of two different expansion velocities showing a cooling of the plasma source and enhancement in the radiation emitted from the layer. Two phases have been observed in the intensity shape of the aluminum and the carbon atoms lines showing an enhancement during the collisionless interaction regime. The photoablation of LDPE wall was occurred during the plateau phase observed in the intensity shape of the carbon atom line, which agree with both the observed peak in the behavior of the emitted ultraviolet (UV) radiation and the framing picture taken at 200 ns.